When Jeffrey Blackman set out to capture New England's treasured covered bridges in photographic portraits, his goal was to create not just a pretty, postcard-perfect picture but to tell a visual story about each bridge's construction, history, and usage through the years. Each of the 96 images here is the result of a careful study from numerous angles and reveals something of the surrounding environment, from the longest two-span covered bridge in the world, the Cornish-Windsor Bridge in New Hampshire, to a tiny, newly built lattice-sided bridge in Townshend, Vermont. A brief essay about trusses explains the structures of the bridges and how these massive, precisely engineered matrixes of wood hold the bridges together.